Cryosurgical palliation of metastatic neuroendocrine tumors resistant to conventional therapy

Surgery
A J BilchikK P Ramming

Abstract

Hepatic cryosurgery is a well-recognized modality for hepatic colon metastases. We examined its potential use for refractory neuroendocrine tumors causing progressive symptoms. Between July 1992 and February 1997, 19 patients (with islet cell, 7; carcinoid, 8; vasoactive intestinal peptide, 1; gastrinoma, 3) underwent cryosurgery with ultrasonography. The number of lesions frozen ranged from 1 to 16 (median, 8), and their diameters ranged from 2 to 15 cm with an average of 4 cm. Patients underwent resection of the primary tumor either before (37%) or concurrent with (32%) cryosurgery, and half underwent excision of metastases with cryosurgery. Before cryosurgery, patients received chemotherapy (63%), somatostatin (47%), interferon (10%), hepatic artery ligation (5%), radiation (10%), and/or omeprazole (16%). The reduction in tumor markers reached 90% (5-hydroxyindoleacetic acid), 80% (vasoactive intestinal peptide), 90% (gastrin), 90% (pancreatic polypeptide), and 80% (serotonin). At a median follow-up of 17 months, the metastases had progressed in 11 patients (two underwent a second cryosurgical procedure that eliminated symptoms) and five had died. Subsequently an additional five patients received chemotherapy and three somat...Continue Reading

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